Allocate bitmap before copying

Allocate bitmap before copying
gcc/ChangeLog:

2016-10-11  Kugan Vivekanandarajah  <kuganv@linaro.org>

	* tree-vrp.c (vrp_intersect_ranges_1): Allocate bitmap before
	  copying.

From-SVN: r240950

gcc/ChangeLog

+2016-10-11  Kugan Vivekanandarajah  <kuganv@linaro.org>
+
+	* tree-vrp.c (vrp_intersect_ranges_1): Allocate bitmap before
+	  copying.
+
 2016-10-10  Andreas Tobler  <andreast@gcc.gnu.org>
 
 	* config.gcc: Add aarch64-*-freebsd* support.

gcc/tree-vrp.c

@@ -8622,7 +8622,10 @@ vrp_intersect_ranges_1 (value_range *vr0, value_range *vr1)
   if (vr0->equiv && vr1->equiv && vr0->equiv != vr1->equiv)
     bitmap_ior_into (vr0->equiv, vr1->equiv);
   else if (vr1->equiv && !vr0->equiv)
-    bitmap_copy (vr0->equiv, vr1->equiv);
+    {
+      vr0->equiv = BITMAP_ALLOC (&vrp_equiv_obstack);
+      bitmap_copy (vr0->equiv, vr1->equiv);
+    }
 }
 
 void